US: 13-M to Europe Size 20

Cross-market children’s footwear width fitting conversion mapping 13-M specifications into 20 for Brannock infant/child grades, M/W/XW sizing indexes, and ball width dimensions.

From Standard & Size

Converted Equivalent

Based on row equivalence: US 13-M | EU 31 | Foot Length 19 cm

Standard cross-walk matching active anthropometric row parameters.

US: 13-M to Europe Size 20 Width Conversion

Analyzing Shoe Width and Fitting Equivalence Across Markets

US: 13-M: Corresponds to a foot length of 19 $\text{cm}$ (7.5 $\text{in}$ ), ball width of 7.3 $\text{cm}$ (2.85 $\text{in}$ ), grade Medium / Standard (D), growth margin 1 $\text{cm}$ , estimated age 8-9y, Mondopoint 190 $\text{mm}$ , and fit type Little Kid Medium (US 13 / Width D).

Europe Size 20: Corresponds to a foot length of 11.5 $\text{cm}$ (4.5 $\text{in}$ ), ball width of 5.6 $\text{cm}$ (2.2 $\text{in}$ ), grade Extra-Wide (4E), growth margin 0.6 $\text{cm}$ , estimated age 12-18m, Mondopoint 115 $\text{mm}$ , and fit type Infant Extra-Wide (US 4 / Width 4E).